So i am trying to control 2 linear actuators with forward and reversing contactors using a PLC program. Basically there are 2 buttons to push open door and close door which will send a signal to the fwd or rev contactor ( one will be energized at a time only) not both!

So on the plc inputs and outputs screen it was showing that the output for the fwd contactor was on and the door open button was active ( as accordingly, however the actual field device was not moving physically forward?)

here is my schematic: basically i am working with M3 millenium crouzet software ; the controller is exhibiting the program instructions but the load device ( actuator is not physically running even though the output card is showing 24V at the specific output ( see contactor 1 fwd and contactor 1 rev on plc outputs) below. enter image description here

Is there something wrong with my PLC?

any ideas anyone?

enter image description here

allen bradley contactor used


m3 controller used https://soda.crouzet.com/pn/?i=88974051

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put on hold as unclear what you're asking by JYelton, Michael Karas, RoyC, Dave Tweed Jun 14 at 4:25

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  • \$\begingroup\$ Power / voltage connections on both sides of actuator read what? Missing highside or low side? \$\endgroup\$ – Sunnyskyguy EE75 Jun 12 at 23:26
  • \$\begingroup\$ It's not clear how you expect us to answer this without a schematic, a program listing and make and model of PLC with link to manual. \$\endgroup\$ – Transistor Jun 12 at 23:31
  • \$\begingroup\$ It appears you may have a 3 position reversible power relay 2P3T , if using a single supply +,-,open? Or a bipolar supply, with a 1P3T contractor Which is it? Is it configured correctly? How is power driven ON and shut off ? Limit switches? Are they configured correctly? \$\endgroup\$ – Sunnyskyguy EE75 Jun 12 at 23:48
  • \$\begingroup\$ alright guys here is the schematic i am currently using. i have wired up my contactors to the following outputs shown in the screen shot below. i am only testing one so do not worry about contactor 2 fwd and contactor 2 rev. \$\endgroup\$ – Guitarman11 Jun 12 at 23:52

Issue was resolved. It was a wiring mishap

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  • \$\begingroup\$ Please be more specific. This is not a useful answer as written. \$\endgroup\$ – Drew 2 days ago
  • \$\begingroup\$ Do you mean that the diagrams in the question are correct, and your setup didn't work because you didn't wire it to the diagram (human error)? \$\endgroup\$ – Nick Alexeev 4 hours ago
  • \$\begingroup\$ basically the common negative on the fwd and reversing contactors were not there so because of that wiring error the field device was not able to run \$\endgroup\$ – Guitarman11 4 hours ago
  • \$\begingroup\$ @Guitarman11 I see. In that case, could you accept you own answer, please? \$\endgroup\$ – Nick Alexeev 3 hours ago

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